611564431121 has 8 divisors (see below), whose sum is σ = 698975177280. Its totient is φ = 524164784688.

The previous prime is 611564431087. The next prime is 611564431189. The reversal of 611564431121 is 121134465116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 611564431121 - 2⁶ = 611564431057 is a prime.

It is a super-2 number, since 2×611564431121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (611564491121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2656526 + ... + 2877543.

It is an arithmetic number, because the mean of its divisors is an integer number (87371897160).

Almost surely, 2^611564431121 is an apocalyptic number.

It is an amenable number.

611564431121 is a deficient number, since it is larger than the sum of its proper divisors (87410746159).

611564431121 is a wasteful number, since it uses less digits than its factorization.

611564431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549863.

The product of its digits is 17280, while the sum is 35.

Adding to 611564431121 its reverse (121134465116), we get a palindrome (732698896237).

The spelling of 611564431121 in words is "six hundred eleven billion, five hundred sixty-four million, four hundred thirty-one thousand, one hundred twenty-one".